VM10P-M13B40 The universal mouthpiece. With an intermediate tip opening and a medium-long facing, it is appreciated by most clarinetists. Tip Opening (1/100 mm): 119.5Facing Length: Medium LongVandoren has developed the "13 series" mouthpiece specifically for American clarinetists using A440 pitch. The difference between "Profile 88" and Traditional mouthpieces is in the exterior angle of the beak. Therefore, the musician is free to choose the model which suits his purpose in terms of best playing position, easiest sound projection, greatest playing comfort, and the most controllable and precise articulation. 008576211202